net: Add ag7xxx driver for Atheros MIPS

Add ethernet driver for the AR933x and AR934x Atheros MIPS machines.
The driver could be easily extended to other WiSoCs.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Wills Wang <wills.wang@live.com>
[fixed Kconfig dependency]
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

drivers/net/Kconfig

@@ -46,6 +46,15 @@ menuconfig NETDEVICES
 
 if NETDEVICES
 
+config AG7XXX
+	bool "Atheros AG7xxx Ethernet MAC support"
+	depends on DM_ETH && ARCH_ATH79
+	select PHYLIB
+	help
+	  This driver supports the Atheros AG7xxx Ethernet MAC. This MAC is
+	  present in the Atheros AR7xxx, AR9xxx and QCA9xxx MIPS chips.
+
+
 config ALTERA_TSE
 	bool "Altera Triple-Speed Ethernet MAC support"
 	depends on DM_ETH

drivers/net/Makefile

@@ -7,6 +7,7 @@
 
 obj-$(CONFIG_PPC4xx_EMAC) += 4xx_enet.o
 obj-$(CONFIG_ALTERA_TSE) += altera_tse.o
+obj-$(CONFIG_AG7XXX) += ag7xxx.o
 obj-$(CONFIG_ARMADA100_FEC) += armada100_fec.o
 obj-$(CONFIG_DRIVER_AT91EMAC) += at91_emac.o
 obj-$(CONFIG_DRIVER_AX88180) += ax88180.o